Wire drawing machine



M 5, 1932. NAJARIAN mssrisl WIRE DRAWING MACHINE Filed May l3, 1930 Patented July 5, 1932 1,865,781

UNITED STATES PATENT OFFICE GABAIBED NAJ'ABIAN, OF NEW HAVEN,

wnm nnswnm mom Application filed Kay 18, 1980. Serial 1T0. 451,905.

, This invention relates to an improvement pending from the under-face of the bed-plate in wire-drawing machines and particularly 16 and is provided at its lower end with a to multi-draw machines for the production worm-wheel 21 meshing into a worm 22 seof wire. I cured to the shaft 23 of an electric motor 24 I The main object of this invention is to proor other suitable source of motive power.

- duce a simple, com act and reliable machine The upper-face of the first draw pull-reel 55 of the type referre to constructed with paris formed with an annular ball-race 25 reticular reference to efiiciency, and in which ceiving a series of ball-bearings 26 which also two or more draws may be effected without roll in a complementary ball-race 27 formed requiring manual rehandling of the wire. in the under-face of an idler-reel 28 having a With the above and other objects in view, central bearing-boss 29 turning freely upon as will appear from the following, my inthe drive-shaft 11 by means of which it is vention consists in a wire-drawing machine centered. I characterized by its provision with a pair of The said idler-reel 28 is provided at its upw drawing-die passages of different diameters; per edge with an outwardly-projecting annuof a first-draw pull-reel for drawing wire lar flange 30 having gear-teeth 31 cut in its through the larger of the two said die-pasperiphery for meshing into a retarding-pinsages; a second-draw pull-reel for drawing ion 32 rotating upon the reduced upper-end wire through the smaller of the two said die- 33 of a stud 34 upstanding from a boss 35 passages; an idler-reel interposed between formed upon the upper-face of the bed-plate 7 the said first-draw pull-reel and the said sec- 16 near the edge thereof, as shown in Fig. 3 0 ond-draw pull-reel; and means for driving of the drawing. the two said pull-reels. Y The upper-face of the idler-reel 28 is My invention further consists in a wireformed with an annular ball-race 36 receiving drawing machine characterized as above and a series of ball-bearings 37 which also bear in having certain other details of construction a race-way 38 formed in the under-face of a and combinations of parts as will be hereinsecond-draw pull-reel 39. after described and particularly recited in The said second-draw pull-reel is coupled the claims. to the vertical driveshaft 11 near the upper- In the accompanying drawing: end thereof by means of a key 40 and is pro- Fi 1 is a view in side elevation of a wire- Vided in the upper-face of its vertical flange drawing machine embodying my invention; 41 with a series of vertical pins 42 designed Fig. 2 is a top or plan view thereof; to increase the capacity of the said reel with- Fig. 3 is a vertical, transverse, sectional out unduly adding weight thereto. 5 view thereof, taken on the line 3-3 of Fig. 2, In the operation of my improved drawingbut on a larger scale; and machine, the wire 43 passes from'a storage- Fig. 4 is a broken, detail, sectional view reel, or other source of supply (not shown), taken on the line 4-4 of Fig; 3. through a passage 44 in a first-draw die-block In the embodiment of my invention here- 44 which serves to reduce the diameter there- 40 in chosen for illustration, I employ a firstof one stage, and around the periphery of the draw pull-reel 10 secured to a vertical drivefirst-draw pull-reel 10, from which the convoshaft 11 by means of a key 12 and provided in llltiOns thereof gradually creep upward to the its under-face with an annular ball-race 13 reperiphery of the intermediate or idler-reel 28, ceiving a series of ball-bearings 14 also rollfrom where the wirenow reduced one stage ing in a complementary ball-race 15 formed by being drawn through the first-draw diein the upper-face of a bed-plate 16 supported block 44-passes around an idler-roll 45, upon a skeletonized-frame 17 having supthence through a passage 46 in a second-draw porting-legs 18. die-block 46 and around the periphery of The reduced lower-end 19 of the vertical the flange 41 of the second-draw pul1-reel39,

ve-shaft 11 is journalled in a boss 20 de which latter, being of larger diameter than i the first-dra w pull-reel 10, will serve to keep an appropriate draft upon the Wire which, after having passed through the second-draw die-block 46, is of smaller diameter but of block 46, ample opportunity is given the wire to properly cool.

, To assist in the cooling operation, I encircle the pefiphery of the idler-reel 28 with a ring-like air-tube 49 having a series of air-ports 50 formed in its inner-face and directed, upon the convolutions of the wire wrapped about the said idler-reel. The ringlike air-tube 49 is connected into the vertical reach 51 of an air-supply pipe 52, which carries at its upper end a Segmental air-chamber 53 having its inner-face provided with air-ports '54 directed at the convolutions of wire located upon the periphery of the second-draw pull-reel 39.

To prevent the idler-reel 28 fromvrotating too freely and thus permitting the convolutions of wire wound thereupon to loosen the snarl, I employ a friction-clamp 55 having a pair of complementary resilient arms 56--56 embracing the stud 34 before referred to and frictionally clamped thereupon by means of' a bolt 57. The inner end of the said frictionclamp 55 is provided with an upstanding coupling-pin 58 extending through the retarding-pinion 32 before referred to and acting to restrain the rotation thereof and hence of the idler-reel 28. v

It will be understood by those skilled in the art that my invention may assume varied physical forms without departing from myinventive conce t, and I, therefore,-do not limit myself to the specific embodiment herein chosen for illustration,vbut only as indicated in the appended claims.

I claim:

1. In a wire-drawing machine, the combination with a pair of drawing-die passages of different diameters; of a first-draw pull-reel for drawing wire through the larger of the two said die-passages; a second-draw pull-reel arranged coaxially with said firstdraw pull-reel for drawing wire through the smaller of the two said die-passages; an idler-reel concentric with and interposed be tween the said first-draw pull-reel and the said second-draw pull-reel, the wire drawn larger in diameter than the said first-draw pull-reel for drawing wire through the small er of the two said die-passages; an idler-reel coaxial with and interposed between the said first-draw reel and the said second-draw reel, the wire drawn from the first-draw pull-reel being transferred to the idler-reel by slipping directly from the former to the latter, and feeding from said idler-reel to said smaller die-passage and thence to said second-draw pull-reel and means for driving the two said pull-reels.

3. In a wire-drawing machine, the combination with a pair of drawing-die passages of different diameters; of a drive-shaft; a firstdraw pull-reel mounted upon and coupled to the said drive-shaft for pulling wire through the larger of the two said die-passages; a second-draw pull-reel also mounted upon'and coupled to the said drive-shaft for drawing wire through the smaller of the two said die-passages; and an idler-reel interposed between the two said pull-reels and mounted upon the said drive-shaft with capaclty for rotation independent thereof, the wire drawn from the first-draw pull-reel being transferred to the idler-reel by slipping dlrectly from the former to the latter, and feeding from said idler-reel to said smaller dle-passage and thence to said second-draw pull-reel. 1

4 In a wire-drawing machine, the combinatlon with a pair of drawing-die passages of different diameters; of a first-draw pullreel for drawing wire through the larger of the two said die-passages; a second-draw pull-reel arranged coaxially with said firstdraw pull-reel for drawing wire through the smaller of the two said die-passages; an idlerreel coaxial with and interposed between the said first-draw pull-reel and the said seconddraw pull-reel and partly nested within one thereof, the wire drawn from the first-draw pull-reel being by slipping directly from the former to the latter, and feeding from said idler-reel to said smaller dieassage and thence to said second-draw pul -reel; and means for drivlng the two said pull-reels.

5. In a wire-drawing machine, the combination with a pair of drawing-die passages of different diameters; of-a first-draw pullreel for drawing wire through the larger of transferred to the idler-reel the two said die-passages; 'a second-draw 1 pull-reel arranged coaxially with said firstdraw pull-reel for drawing wire through the smaller of the two said die-passages; an idler- ,reel coaxial with and interposed between the said first-draw pull-reel and the said seconddraw pull-reel and partly nested within one thereof, "the wire drawn from the first-draw pull-reel being transferred to the idler-reel by slipping directly from the former to the latter, and feeding from said idler-reel to said smaller die passage and thence to said second-draw pull-reel; means for retarding rotation of said idler-reel; and means for driving the two said pull-reels 6. In a wire-drawing machine, the combination with a pair of drawing-die passages of different diameters; of a first-draw pullreel for drawing wire through the larger of the two said die-passages a second-draw pullreel arranged coaxially with said first-draw pull-reel for drawing wire through the small er of the two said die-passages; an idler-reel coaxial with and interposed between the said first-draw pull-reel and the said second-draw pull-reel and partly nested within one thereof, the wire drawn from the first-draw pullreel being transferred to the idler-reel by slipping directly'from the former to the latter, and feeding from said idler-reel to said smaller die-passage and thence to said seconddraw pull-reel; means for retarding rotation of said idler-reel including a member driven by said idler-reel and a friction brake device applied to said member; and means for driving the two said pull-reels.

In testimony whereof,'I have signed this specification.

, GARABED NAJARIAN. 

